Entrance of 23x4 metres. A shaft of about 7 metres leads to a wide floor. To the south, after a 6-metre drop, it is possible to continue first on a steep slope and then more flatly for about twenty metres, until a formation constriction makes it impassable, with the continuation of the gallery visible on the other side, somewhat wider and at a lower level.

The entrance can be descended on the S side by means of a steep ramp with a lot of vegetation that leads to a small shaft at about -10 metres; it can also be descended from the E side by a line of bolts (the first is 10mm with a 17 spanner, the rest 8mm with a 13 spanner), an access that joins the previous one at the same point. A shaft of about 7 metres leads to a wide floor where, on its N side, one continues descending through a narrower fissure until reaching a large embedded block. From this point and in a northerly direction the gallery continues, narrow and high, descending until it becomes impenetrable. To the south, after a 6-metre drop, it is possible to continue first on a steep slope and then more flatly for about twenty metres, until a formation constriction makes it impassable.